To say what you are ‘going to’ do use this formula:
the present tense of ir (to go) + a + infinitive

ir (to go) infinitive
voy a salir I am going to go out
vas a hacer you are going (singular) to do
va a ir he/she/it is going to go
vamos a escuchar we are going to listen
vais a ver you are going (plural) to see
van a jugar they are going to play


The near future tense is used with time expressions like:
mañana tomorrow
la semana que viene next week
el sábado on Saturday
este fin de semana this weekend
esta noche tonight
en las vacaciones in the holidays